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CVE-2021-29457

7.8 · HIGH

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files.

Published Apr 19, 2021CWE-122EPSS 2.15%

Overview

CVE-2021-29457 is a high-severity vulnerability. It was published on April 19, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when _writing_ the metadata, which is a less frequently used Exiv2 operation than _reading_ the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/Exiv2/exiv2/issues/1529GitHubgithub.com/Exiv2/exiv2/pull/1534GitHubgithub.com/Exiv2/exiv2/security/advisories/GHSA-v74w-h496-cgqmReflists.debian.org/debian-lts-announce/2021/08/msg00028.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2XQT5F5IINTDYDAFGVGQZ7PMMLG7I5ZZ/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2A5GMJEXQ5Q76JK6F6VKK5JYCLVFGKN/Refsecurity.gentoo.org/glsa/202312-06Refwww.debian.org/security/2021/dsa-4958GitHubgithub.com/Exiv2/exiv2/issues/1529GitHubgithub.com/Exiv2/exiv2/pull/1534

How CyberStrike helps

Frequently asked questions

What is CVE-2021-29457?

CVE-2021-29457 is a high-severity vulnerability. It was published on April 19, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-29457?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-29457?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-29457?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-29457 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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